A military tactic used by the Golden Horde (i.e. Genghis Khan and his descendents), in which an army invades an outnumbered force and overpowers them, but doesn't kill many of them; instead, the conquerors rape and otherwise humiliate the conquered, then leave.

I can't walk to school anymore without worrying about a bunch of punks giving me the ol' Mongolian clusterfuck.